Function to get the first item in an array.
first also has a separate function of the same name to get the first character of the text.
It works in the opposite way to last.
Spec
first(<collection>)
| Argument | Default | Description |
|---|---|---|
| collection | Required field | Target arrray. |
How to use
In most cases, it is used to initialize or set variables.
The type depends on the data handled by the array.
Clicking on first in the "Expression" tab sets the function name and () in the formula field.
You can change the contents of the function by clicking on the purple icon.
When dynamic content or variables are used in expressions, special specifications are required.
(How to get dynamic content with expressions.)
Examples of arguments and results
In this case, array variables [100,200,300] are provided as an example.
| Index | Value |
|---|---|
| 0 | 100 |
| 1 | 200 |
| 2 | 300 |
For example, first(variables('array')) will result in 100.
Since the array item data type in this example is integer, "Type" should be "Integer".
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